THREE-HOUR MARCH Airmen complete a 9/11 Memorial Ruck March on Joint Base Andrews, Md., Sept. 11, 2012, to commemorate the 9/11 terrorist attacks. More than 25 airmen, assigned to the 11th Security Forces Group, participated in the three-hour march around the installation's perimeter. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 369171-N-LCE58-244.jpg Photo Gallery